Linda,
How many concurrent Trkfmt commands are you running?
Are you running simultaneous commands against adjacent UCBs?
IIRC the Ramac has 2 3390 addresses per drawer sharing the read/write assembly.
I would only run 4 commands against addresses that were in unique drawers.
Dave O'Brien
NIH Contractor
________________________________________
From: IBM Mainframe Discussion List [ibm-m...@bama.ua.edu] On Behalf Of Linda
Mooney [linda.lst...@comcast.net]
Sent: Tuesday, June 30, 2009 7:36 PM
To: IBM-MAIN@bama.ua.edu
Subject: ERASEDATA - DASD disposal
Greetings!
I am in the process of retiring 3 RAMAC 2 racks, each with a 3990 mod 6
controller, and 1 RAMAC 3 rack, with a 9293 controller. All data has been
moved to new DASD. The RAMAC DASD will be surplused so I have to be sure that
the data has been wiped clean and nothing is recoverable - w ithout physically
damaging the devices. All of the DASD is 3390-3.
For the RAMAC2 data wipe I have been using ICKDSF release 17.0
TRKFMT UNITADDRESS(B40) VERIFY(ZSDLZ6) ERASEDATA -
CYLRANGE(0,5000) CYCLES(4)
That takes about 20 minutes per cycle. Our maintenance vendor recommended 4
cycles. That seems to be proceeding fine.
I am having a problem with the RAMAC 3. I tried the same coding with the RAMAC
3 and it took about 5 hours to run (per address) as compared to roughly 1 hour
20 minutes on the RAMAC 2 . All devices are 3390-3, each controller has 4
paths, low system activity generally with no other work on these strings, and
the long run time was consistent for several packs on the RAMAC 3.
Should I use some other ICKDSF command to wipe the RAMAC3? Any t houghts on
why the run time would be so mu ch longer for the RAMAC3? Do you consider
the 4 passes with TRKFMT enough to be sure that the data is really gone?
TIA,
Linda Mooney
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